Arduino for STM32

Thanks for your replay.
Yes, my Maple Mini board doesn't flash the LED when press reset button.
I followed the instructions in the link you provided and DFU and Serial drivers were successful installed.
But in the next sentence provided by the link, I think something is wrong:

"Re-start the Arduino ...

I am in the same situation as g0mgx was.
Initially I used without problems a SAMD21 M0 clone board.
Later, I got a STM32F103RC8T6 Maple Mini clone board, which is not seen at all in Device Manager by the PC.
I followed all the steps provided by ag123, but no success.
When I use dfu-util batch I get ...